Troubleshooting Guide; Refrigeration Cycle System - Panasonic WH-MHF09G3E5 Service Manual

16. Troubleshooting Guide

16.1

Refrigeration Cycle System

In order to diagnose malfunctions, make sure that there
are no electrical problems before inspecting the
refrigeration cycle.
Such problems include insufficient insulation, problem
with the power source, malfunction of a compressor and a
fan.
The normal pressure of the refrigeration cycle depends
on various conditions, the standard values for them are
shown in the table on the right.
Value of electric
current during operation
Lower than specified
Gas side
pressure
Higher than specified
Water leakage or insufficient
water flow rate in the system
Heating Mode
Low
Low
Low
Normal Pressure (Standard)
Heating Mode
 Condition: • Outdoor temperature 7°C at
Excessive amount
of refrigerant
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
expansion valve
80
Gas pressure
MPa (kg/cm G)
2
1.4 ~ 1.8 (14 ~ 18)
heating mode.
• Compressor operates at
rated frequency.
• Water outlet temperature
35°C at heating mode.
● Measuring electric current
during operation
● Measuring gas side pressure